Abstract

In summary, the phase stability in plasma sprayed 8 wt.% PSZ coatings with a porous and cracked microstructure were studied for times of up to 10 000 h at temperatures of 982 °C, 1204 °C, and 1315 °C. The two coatings behaved similarly and exhibited minimal change in the monoclinic content at exposures of 982 °C, while exposures at 1204 °C and 1315 °C resulted in increasing amounts of monoclinic phase versus time; the monoclinic phase reached a maximum of 40% at longer time exposures at the highest temperature as predicted by the phase diagram.

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